Robinson Cano clubbed the first homer in the ballpark, and Hideki Matsui and Cody Ransom added blasts that kissed the right-field and left-field foul poles.

The real opener is April 16 against the Indians, and the billion-dollar Stadium will be bathed in much more excitement. But for test runs, last night was pretty neat.

“People make the stadium,” manager Joe Girardi said, before 48,402 christened the adult arcade whose centerpiece is a fascinating baseball field that hitting coach Kevin Long told the manager looked like the old Stadium.

With flesh in the seats, the Stadium was more complete than it appeared during Thursday’s workout, which was attended but not crowded. Despite rain throughout the day and resurfacing in the fourth inning, the crowd made itself at home.

The right-field bleacher denizens wasted no time getting into their first-inning roll call act and the crowd reacted to Mariano Rivera arriving from the bullpen — this one in right-center — to Metallica’s “Enter Sandman.”

For some reason, what was left of the crowd in the seventh enjoyed the tired “YMCA” act that should have been left behind.

“This place is amazing, everything is great,” Matsui said.

Cano clubbed the first homer in the Stadium when he crushed a 1-1 pitch from former Yankees lefty Ted Lilly into the right-field seats in the second inning.

“That’s going to be forever in my mind, the first one here,” Cano said.

Matsui crushed a two-run homer off the right-field foul pole in the third, and Ransom, Alex Rodriguez’s replacement at third, banged a three-run homer off the left-field foul pole in the fourth.

Derek Jeter went 2-for-2, scored a run and made an error. Mark Teixeira’s debut wasn’t much — 0-for-3 and two whiffs.

“I swing and miss a lot here,” Teixeira said when asked about the difference playing in the new Stadium.

Chien-Ming Wang went five frames, gave up four runs, six hits, walked two and fanned three.

Since Jeter didn’t know anything but the old park as home, he admitted wearing the pinstripes in a different setting was odd.

“It was strange,” Jeter said. “Everything is different. They have done a tremendous job. It’s going to take a while to get used to. It took an inning and a half to figure out the balls and strikes on the scoreboard. I think everyone is overwhelmed by it. I can’t think of anything else they could have put in this stadium.”

Ransom didn’t spend much time at the former Stadium, but it didn’t take long for the player who recorded the final out last year to understand it’s always more than a structure that makes a building.